Summary: This week, can we colonise Mars? What's causes that smell after it rains? Can genetics inform skin care? And how do astronauts shower in space? Chris Smith, Richard Hollingham and Max Sanderson join Kat Arney to take on your quandaries, and also discuss some of the science news you might have missed this week: the Russian space race fail, hijacking a jet by hacking, and why humans feel pain...
